Wouldn't it be nice to just plug your USB device right into the wall and not have to use the power adapter and take up an outlet? Apartment Therapy has a guide for you to do just that or you can use a plug-and-play option.

The Wall Plate Charger from RCA that Apartment Therapy mentions is $20 and fits over your wall outlet, adding two USB outlets, but subtracting one standard outlet.

If you're comfortable doing a little electrical work, however, you can switch out the wall outlet with one that has two USB outlets built-in. See the article for illustrations and step-by-step directions. Alternately, there's always thispreviously mentioned plug-in alternative that requires no electrical work whatsoever.